blk-mq: do not initialize req->special

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Drivers can reach their private data easily using the blk_mq_rq_to_pdu
helper and don't need req->special.  By not initializing it code can
be simplified nicely, and we also shave off a few more instructions from
the I/O path.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>

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This commit is contained in:

Christoph Hellwig 2014-04-14 10:30:07 +02:00 • committed by Jens Axboe

parent 742ee69b92

commit 9d74e25737

5 changed files with 9 additions and 27 deletions

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10

block/blk-flush.c

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15

block/blk-mq.c

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1

block/blk-mq.h

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4

drivers/block/null_blk.c

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6

drivers/block/virtio_blk.c

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